Ffrom the upstream vim changelog:
Patch 6.1.438
Problem: When Perl has thread support Vim cannot use the Perl
interface.
Solution: Add a configure check and disable Perl when it will not
work.
However, I've built a version with perl interface in Fedora
Core/development. Can you please download it and test it, as I've
never used this interface before (:.perldo tr/a-z/A-Z/; works).
Please reopen this bugreport if there any problems with the perl
interface.
The fixed version is 6.2.154-3